Na+ reabsorption is usually co-transported with glucose in the kidney, so not much is left when things get in to the intestine, and if there was salt coming out of your poo, then your butt would get really dry by osmosis 😀
Na+ reabsorption is usually co-transported with glucose in the kidney, so not much is left when things get in to the intestine, and if there was salt coming out of your poo, then your butt would get really dry by osmosis 😀